Patio door lock



FIG. 1 is a front perspective view of the patio door lock in an unlocked position;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a back elevational view thereof; and,

FIG. 8 is a front perspective view of the patio door lock in a locked position. 

The ornamental design for a patio door lock, as shown and described. 